Book/Report

FZJ-2016-05793

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Wiederinbetriebnahme der Linerkühlung eines mittelgrossen HTR Spannbetondruckbehälters bei einem Kernaufheizstörfall mit Ausfall der Linerkühlung

Kim, D. I. (Corresponding author)FZJ*

1991
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/12665

Report No.: Juel-2543

Abstract: The safety analysis of medium-sized High-Temperature Reactors (HTR) has to make a statement an the technical basis for the risk during a hypothetical core heat-up accident. The failure of the core heat removal system determines the risk of the HTR. During this accident the liner cooling system is the only active heat sink. Thera are conceivable accidents during which the core cooling system and the liner cooling system are not avaiiable for a considerable time. This paper investigates experimentally and theoreticaily the possibility of refeeding the liner coofing system and the heat transfer processes of a two-phase flow during a refeeding of the liner cooling system above the saturation temperature. The experiments have shown that even at an initial temperature of 700°C it is stillpossible to refeed the liner cooling system without difficufty. Depending an the initial temperature and flow, a steam blockage of the wofing tubes may temporarily occur but this does not interrupt the wofing process. At initial temperatures far above the saturation temperature it is advisable to carry out reflooding with a flow below that of normal operation in order to avoid excessive pressure in the hot tubes and to keep the thermal stress low. The SIKADE-2 simulation gave good agreement with the experimental data. Theapplication of the reflooding process to the liner cooling system in the THTR-300 during a core heat-up accident enables one to state that reflooding of the liner cooling system in the cylindrical wall would take about 10 or 20 minutes if refeeding is assumed to start at an initial temperature of 300°C or 450°C.

---

Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

---

Database coverage:

---